Yamaha YZ 2019 Series Owner's Service Manual page 394

EAM20149
WIRING DIAGRAM
YZ250FXK 2019
1. Joint connector
2. Joint connector
3. Joint connector
4. AC magneto
5. Rectifier/regulator
6. Main relay
7. Engine ground
8. Battery
9. Frame ground
10. Starter relay
11. Main fuse
12. Starter motor
13. Starter relay diode
14. Warning light
15. Engine trouble warning light
16. Fuel level warning light
17. Resistor
18. Fuel sender
19. Diode
20. Coupler for connecting optional
part
21. ECU (Engine Control Unit)
22. Ignition coil
23. Spark plug
24. Injector
25. Fuel pump
26. Radiator fan motor relay
27. Radiator fan motor fuse
28. Coupler (not used)
29. Joint connector
30. Intake air temperature sensor
31. Coolant temperature sensor
32. Throttle position sensor
33. Intake air pressure sensor
34. Lean angle sensor
35. Engine stop switch
36. Neutral switch
37. Diode
38. Starting circuit cut-off relay
39. Clutch switch
40. Start switch
41. Frame ground
42. Ignition coil sub-lead
43. Negative battery lead
EAM30323
COLOR CODE
B Black
Br Brown
G Green
Gy Gray
L Blue
Lg Light green
O Orange
P Pink
R Red
Sb Sky blue
W White
Y Yellow
B/L Black/Blue
B/O Black/Orange
B/Y Black/Yellow
Br/W Brown/White
G/B Green/Black
G/W Green/White
G/Y Green/Yellow
L/B Blue/Black
L/G Blue/Green
L/R Blue/Red
L/W Blue/White
L/Y Blue/Yellow
P/L Pink/Blue
R/B Red/Black
R/L Red/Blue
R/W Red/White
W/B White/Black
Y/G Yellow/Green
Y/R Yellow/Red
Y/W Yellow/White